201000221220 has 96 divisors (see below), whose sum is σ = 577007504640. Its totient is φ = 52249200640.

The previous prime is 201000221183. The next prime is 201000221231. The reversal of 201000221220 is 22122000102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 201000221196 and 201000221205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2975176 + ... + 3041984.

It is an arithmetic number, because the mean of its divisors is an integer number (6010494840).

Almost surely, 2^201000221220 is an apocalyptic number.

201000221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201000221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288503752320).

201000221220 is an abundant number, since it is smaller than the sum of its proper divisors (376007283420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201000221220 is a wasteful number, since it uses less digits than its factorization.

201000221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68085 (or 68083 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 201000221220 its reverse (22122000102), we get a palindrome (223122221322).

The spelling of 201000221220 in words is "two hundred one billion, two hundred twenty-one thousand, two hundred twenty".